项目小笔记2--qt designer 修改字体，部件拖入layout，引用time模块延时，正则表达式判断输入，进制转换，部件固定大小，graphics view显示图片，消息提示框使用

可以学习到：qt designer 修改字体，部件拖入layout，引用time模块延时，正则表达式判断输入，进制转换，部件固定大小，graphics view显示图片，消息提示框使用

1，qt designer 修改字体，比较简单，选中部件，右侧找到如下：

 

 

 2，qt designer 部件拖入layout：拖动部件，直接移动到右侧的如图所示的layout里面即可：

 

 

 3，引用time模块延时：代码如下

import time
time.sleep(1)

4，正则表达式判断输入以及进制转换：字符转换为进制格式使用bin（），hex（）等函数，转换为整型使用int（）函数，return表示结束函数

import re
pattern = '0[x|X][0|1][0-9a-fA-F]'#判断模板：0x**  十六进制格式
        ADDR = self.my_ui.lineEdit.text()
        if len(ADDR) == 4:
            flag = re.match(pattern, ADDR)  # 如何判断输入的字符是否符合相应的要求呢？使用正则表达式，即使用re模块。
            if flag:
                ADDR_Bin = bin(int(ADDR, 16))[2:]  # 转换为二进制，并且去掉“0b”，也就是前两位字符不要
                ADDR_Bin = ADDR_Bin.rjust(5, '0')  # 原字符串右侧对齐， 左侧补零，补齐后总位宽为8 
            else:
                QMessageBox.warning(my_MainWindow, "警告", "输入ADDR不对哟", QMessageBox.Yes)
                return
        else:
            QMessageBox.warning(my_MainWindow, "警告", "输入ADDR只能是4个字符呐", QMessageBox.Yes)
            return

5，部件固定大小：

        self.my_ui.textBrowser.setFixedHeight(300)
        self.my_ui.textBrowser_2.setFixedHeight(300)
        self.my_ui.textBrowser_3.setFixedHeight(300)
        self.my_ui.textBrowser.setFixedWidth(300)
        self.my_ui.textBrowser_2.setFixedWidth(200)
        self.my_ui.textBrowser_3.setFixedWidth(200)

6，graphics view显示图片：这里加入视图部件后，信号与槽机制要使用lambda:将窗口作为参数传递出去才有效

        self.pix = QtGui.QPixmap('2.png')
        self.scene = QtWidgets.QGraphicsScene()#创建场景
        self.item = QGraphicsPixmapItem(self.pix)  # 创建像素图元
        self.item.setScale(1.49)#放大1.49倍
        self.scene.addItem(self.item)#将图元添加到场景中
        self.my_ui.graphicsView.setScene(self.scene)#将场景加入到视图中显示出来

完整代码：

1，gui转换代码：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'GUI.ui'
#
# Created by: PyQt5 UI code generator 5.14.2
#
# WARNING! All changes made in this file will be lost!


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1172, 871)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
        MainWindow.setSizePolicy(sizePolicy)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName("verticalLayout")
        spacerItem = QtWidgets.QSpacerItem(20, 20, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
        self.verticalLayout.addItem(spacerItem)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.verticalLayout_18 = QtWidgets.QVBoxLayout()
        self.verticalLayout_18.setObjectName("verticalLayout_18")
        self.label_25 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_25.sizePolicy().hasHeightForWidth())
        self.label_25.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_25.setFont(font)
        self.label_25.setAlignment(QtCore.Qt.AlignCenter)
        self.label_25.setObjectName("label_25")
        self.verticalLayout_18.addWidget(self.label_25)
        self.comboBox = QtWidgets.QComboBox(self.centralwidget)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.comboBox.setFont(font)
        self.comboBox.setObjectName("comboBox")
        self.verticalLayout_18.addWidget(self.comboBox)
        self.horizontalLayout_2.addLayout(self.verticalLayout_18)
        self.verticalLayout_17 = QtWidgets.QVBoxLayout()
        self.verticalLayout_17.setObjectName("verticalLayout_17")
        self.label_23 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_23.sizePolicy().hasHeightForWidth())
        self.label_23.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_23.setFont(font)
        self.label_23.setAlignment(QtCore.Qt.AlignCenter)
        self.label_23.setObjectName("label_23")
        self.verticalLayout_17.addWidget(self.label_23)
        self.spinBox_3 = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox_3.sizePolicy().hasHeightForWidth())
        self.spinBox_3.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox_3.setFont(font)
        self.spinBox_3.setMaximum(1)
        self.spinBox_3.setObjectName("spinBox_3")
        self.verticalLayout_17.addWidget(self.spinBox_3)
        self.horizontalLayout_2.addLayout(self.verticalLayout_17)
        self.verticalLayout_16 = QtWidgets.QVBoxLayout()
        self.verticalLayout_16.setObjectName("verticalLayout_16")
        self.label_22 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_22.sizePolicy().hasHeightForWidth())
        self.label_22.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_22.setFont(font)
        self.label_22.setAlignment(QtCore.Qt.AlignCenter)
        self.label_22.setObjectName("label_22")
        self.verticalLayout_16.addWidget(self.label_22)
        self.spinBox_4 = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox_4.sizePolicy().hasHeightForWidth())
        self.spinBox_4.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox_4.setFont(font)
        self.spinBox_4.setMaximum(1)
        self.spinBox_4.setObjectName("spinBox_4")
        self.verticalLayout_16.addWidget(self.spinBox_4)
        self.horizontalLayout_2.addLayout(self.verticalLayout_16)
        self.verticalLayout_15 = QtWidgets.QVBoxLayout()
        self.verticalLayout_15.setObjectName("verticalLayout_15")
        self.label_21 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_21.sizePolicy().hasHeightForWidth())
        self.label_21.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_21.setFont(font)
        self.label_21.setAlignment(QtCore.Qt.AlignCenter)
        self.label_21.setObjectName("label_21")
        self.verticalLayout_15.addWidget(self.label_21)
        self.spinBox_5 = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox_5.sizePolicy().hasHeightForWidth())
        self.spinBox_5.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox_5.setFont(font)
        self.spinBox_5.setMaximum(1)
        self.spinBox_5.setObjectName("spinBox_5")
        self.verticalLayout_15.addWidget(self.spinBox_5)
        self.horizontalLayout_2.addLayout(self.verticalLayout_15)
        self.verticalLayout_14 = QtWidgets.QVBoxLayout()
        self.verticalLayout_14.setObjectName("verticalLayout_14")
        self.label_20 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_20.sizePolicy().hasHeightForWidth())
        self.label_20.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_20.setFont(font)
        self.label_20.setAlignment(QtCore.Qt.AlignCenter)
        self.label_20.setObjectName("label_20")
        self.verticalLayout_14.addWidget(self.label_20)
        self.spinBox_6 = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox_6.sizePolicy().hasHeightForWidth())
        self.spinBox_6.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox_6.setFont(font)
        self.spinBox_6.setMaximum(1)
        self.spinBox_6.setObjectName("spinBox_6")
        self.verticalLayout_14.addWidget(self.spinBox_6)
        self.horizontalLayout_2.addLayout(self.verticalLayout_14)
        self.verticalLayout_13 = QtWidgets.QVBoxLayout()
        self.verticalLayout_13.setObjectName("verticalLayout_13")
        self.label_19 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_19.sizePolicy().hasHeightForWidth())
        self.label_19.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_19.setFont(font)
        self.label_19.setAlignment(QtCore.Qt.AlignCenter)
        self.label_19.setObjectName("label_19")
        self.verticalLayout_13.addWidget(self.label_19)
        self.spinBox_7 = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox_7.sizePolicy().hasHeightForWidth())
        self.spinBox_7.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox_7.setFont(font)
        self.spinBox_7.setMaximum(1)
        self.spinBox_7.setObjectName("spinBox_7")
        self.verticalLayout_13.addWidget(self.spinBox_7)
        self.horizontalLayout_2.addLayout(self.verticalLayout_13)
        self.verticalLayout_12 = QtWidgets.QVBoxLayout()
        self.verticalLayout_12.setObjectName("verticalLayout_12")
        self.label_18 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_18.sizePolicy().hasHeightForWidth())
        self.label_18.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_18.setFont(font)
        self.label_18.setAlignment(QtCore.Qt.AlignCenter)
        self.label_18.setObjectName("label_18")
        self.verticalLayout_12.addWidget(self.label_18)
        self.spinBox_8 = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox_8.sizePolicy().hasHeightForWidth())
        self.spinBox_8.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox_8.setFont(font)
        self.spinBox_8.setMaximum(1)
        self.spinBox_8.setObjectName("spinBox_8")
        self.verticalLayout_12.addWidget(self.spinBox_8)
        self.horizontalLayout_2.addLayout(self.verticalLayout_12)
        self.verticalLayout_11 = QtWidgets.QVBoxLayout()
        self.verticalLayout_11.setObjectName("verticalLayout_11")
        self.label_17 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_17.sizePolicy().hasHeightForWidth())
        self.label_17.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_17.setFont(font)
        self.label_17.setAlignment(QtCore.Qt.AlignCenter)
        self.label_17.setObjectName("label_17")
        self.verticalLayout_11.addWidget(self.label_17)
        self.spinBox_9 = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox_9.sizePolicy().hasHeightForWidth())
        self.spinBox_9.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox_9.setFont(font)
        self.spinBox_9.setMaximum(1)
        self.spinBox_9.setObjectName("spinBox_9")
        self.verticalLayout_11.addWidget(self.spinBox_9)
        self.horizontalLayout_2.addLayout(self.verticalLayout_11)
        self.verticalLayout_10 = QtWidgets.QVBoxLayout()
        self.verticalLayout_10.setObjectName("verticalLayout_10")
        self.label_16 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_16.sizePolicy().hasHeightForWidth())
        self.label_16.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_16.setFont(font)
        self.label_16.setAlignment(QtCore.Qt.AlignCenter)
        self.label_16.setObjectName("label_16")
        self.verticalLayout_10.addWidget(self.label_16)
        self.spinBox_10 = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox_10.sizePolicy().hasHeightForWidth())
        self.spinBox_10.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox_10.setFont(font)
        self.spinBox_10.setMaximum(1)
        self.spinBox_10.setObjectName("spinBox_10")
        self.verticalLayout_10.addWidget(self.spinBox_10)
        self.horizontalLayout_2.addLayout(self.verticalLayout_10)
        self.verticalLayout_9 = QtWidgets.QVBoxLayout()
        self.verticalLayout_9.setObjectName("verticalLayout_9")
        self.label_15 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_15.sizePolicy().hasHeightForWidth())
        self.label_15.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_15.setFont(font)
        self.label_15.setAlignment(QtCore.Qt.AlignCenter)
        self.label_15.setObjectName("label_15")
        self.verticalLayout_9.addWidget(self.label_15)
        self.spinBox_11 = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox_11.sizePolicy().hasHeightForWidth())
        self.spinBox_11.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox_11.setFont(font)
        self.spinBox_11.setMaximum(1)
        self.spinBox_11.setObjectName("spinBox_11")
        self.verticalLayout_9.addWidget(self.spinBox_11)
        self.horizontalLayout_2.addLayout(self.verticalLayout_9)
        self.verticalLayout_8 = QtWidgets.QVBoxLayout()
        self.verticalLayout_8.setObjectName("verticalLayout_8")
        self.label_14 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_14.sizePolicy().hasHeightForWidth())
        self.label_14.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_14.setFont(font)
        self.label_14.setAlignment(QtCore.Qt.AlignCenter)
        self.label_14.setObjectName("label_14")
        self.verticalLayout_8.addWidget(self.label_14)
        self.spinBox = QtWidgets.QSpinBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.spinBox.sizePolicy().hasHeightForWidth())
        self.spinBox.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.spinBox.setFont(font)
        self.spinBox.setSuffix("")
        self.spinBox.setMaximum(1)
        self.spinBox.setSingleStep(1)
        self.spinBox.setObjectName("spinBox")
        self.verticalLayout_8.addWidget(self.spinBox)
        self.horizontalLayout_2.addLayout(self.verticalLayout_8)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
        self.verticalLayout_7 = QtWidgets.QVBoxLayout()
        self.verticalLayout_7.setObjectName("verticalLayout_7")
        self.label_5 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_5.sizePolicy().hasHeightForWidth())
        self.label_5.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_5.setFont(font)
        self.label_5.setAlignment(QtCore.Qt.AlignCenter)
        self.label_5.setObjectName("label_5")
        self.verticalLayout_7.addWidget(self.label_5)
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.lineEdit.sizePolicy().hasHeightForWidth())
        self.lineEdit.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.lineEdit.setFont(font)
        self.lineEdit.setText("")
        self.lineEdit.setAlignment(QtCore.Qt.AlignCenter)
        self.lineEdit.setObjectName("lineEdit")
        self.verticalLayout_7.addWidget(self.lineEdit)
        self.horizontalLayout_5.addLayout(self.verticalLayout_7)
        self.verticalLayout_6 = QtWidgets.QVBoxLayout()
        self.verticalLayout_6.setObjectName("verticalLayout_6")
        self.label_3 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_3.sizePolicy().hasHeightForWidth())
        self.label_3.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.label_3.setFont(font)
        self.label_3.setAlignment(QtCore.Qt.AlignCenter)
        self.label_3.setObjectName("label_3")
        self.verticalLayout_6.addWidget(self.label_3)
        self.comboBox_2 = QtWidgets.QComboBox(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.comboBox_2.sizePolicy().hasHeightForWidth())
        self.comboBox_2.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.comboBox_2.setFont(font)
        self.comboBox_2.setObjectName("comboBox_2")
        self.verticalLayout_6.addWidget(self.comboBox_2)
        self.horizontalLayout_5.addLayout(self.verticalLayout_6)
        self.verticalLayout.addLayout(self.horizontalLayout_5)
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.pushButton.sizePolicy().hasHeightForWidth())
        self.pushButton.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.pushButton.setFont(font)
        self.pushButton.setObjectName("pushButton")
        self.verticalLayout.addWidget(self.pushButton)
        self.line = QtWidgets.QFrame(self.centralwidget)
        self.line.setFrameShape(QtWidgets.QFrame.HLine)
        self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.line.setObjectName("line")
        self.verticalLayout.addWidget(self.line)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.verticalLayout_4 = QtWidgets.QVBoxLayout()
        self.verticalLayout_4.setSpacing(7)
        self.verticalLayout_4.setObjectName("verticalLayout_4")
        self.pushButton_5 = QtWidgets.QPushButton(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.pushButton_5.sizePolicy().hasHeightForWidth())
        self.pushButton_5.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.pushButton_5.setFont(font)
        self.pushButton_5.setObjectName("pushButton_5")
        self.verticalLayout_4.addWidget(self.pushButton_5)
        self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.pushButton_2.sizePolicy().hasHeightForWidth())
        self.pushButton_2.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.pushButton_2.setFont(font)
        self.pushButton_2.setObjectName("pushButton_2")
        self.verticalLayout_4.addWidget(self.pushButton_2)
        self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.pushButton_4.sizePolicy().hasHeightForWidth())
        self.pushButton_4.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.pushButton_4.setFont(font)
        self.pushButton_4.setObjectName("pushButton_4")
        self.verticalLayout_4.addWidget(self.pushButton_4)
        self.pushButton_6 = QtWidgets.QPushButton(self.centralwidget)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.pushButton_6.setFont(font)
        self.pushButton_6.setObjectName("pushButton_6")
        self.verticalLayout_4.addWidget(self.pushButton_6)
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.pushButton_3.sizePolicy().hasHeightForWidth())
        self.pushButton_3.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.pushButton_3.setFont(font)
        self.pushButton_3.setObjectName("pushButton_3")
        self.horizontalLayout.addWidget(self.pushButton_3)
        self.verticalLayout_4.addLayout(self.horizontalLayout)
        self.horizontalLayout_4.addLayout(self.verticalLayout_4)
        self.line_2 = QtWidgets.QFrame(self.centralwidget)
        self.line_2.setFrameShape(QtWidgets.QFrame.VLine)
        self.line_2.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.line_2.setObjectName("line_2")
        self.horizontalLayout_4.addWidget(self.line_2)
        spacerItem1 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_4.addItem(spacerItem1)
        self.verticalLayout_3 = QtWidgets.QVBoxLayout()
        self.verticalLayout_3.setObjectName("verticalLayout_3")
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_2.sizePolicy().hasHeightForWidth())
        self.label_2.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.label_2.setFont(font)
        self.label_2.setAlignment(QtCore.Qt.AlignCenter)
        self.label_2.setObjectName("label_2")
        self.verticalLayout_3.addWidget(self.label_2)
        self.textBrowser = QtWidgets.QTextBrowser(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.textBrowser.sizePolicy().hasHeightForWidth())
        self.textBrowser.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.textBrowser.setFont(font)
        self.textBrowser.setObjectName("textBrowser")
        self.verticalLayout_3.addWidget(self.textBrowser)
        self.horizontalLayout_4.addLayout(self.verticalLayout_3)
        spacerItem2 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_4.addItem(spacerItem2)
        self.verticalLayout_5 = QtWidgets.QVBoxLayout()
        self.verticalLayout_5.setObjectName("verticalLayout_5")
        self.label_4 = QtWidgets.QLabel(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_4.sizePolicy().hasHeightForWidth())
        self.label_4.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.label_4.setFont(font)
        self.label_4.setAlignment(QtCore.Qt.AlignCenter)
        self.label_4.setObjectName("label_4")
        self.verticalLayout_5.addWidget(self.label_4)
        self.textBrowser_2 = QtWidgets.QTextBrowser(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.textBrowser_2.sizePolicy().hasHeightForWidth())
        self.textBrowser_2.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.textBrowser_2.setFont(font)
        self.textBrowser_2.setObjectName("textBrowser_2")
        self.verticalLayout_5.addWidget(self.textBrowser_2)
        self.horizontalLayout_4.addLayout(self.verticalLayout_5)
        spacerItem3 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_4.addItem(spacerItem3)
        self.verticalLayout_2 = QtWidgets.QVBoxLayout()
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.label_6 = QtWidgets.QLabel(self.centralwidget)
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(12)
        self.label_6.setFont(font)
        self.label_6.setAlignment(QtCore.Qt.AlignCenter)
        self.label_6.setObjectName("label_6")
        self.verticalLayout_2.addWidget(self.label_6)
        self.textBrowser_3 = QtWidgets.QTextBrowser(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.MinimumExpanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.textBrowser_3.sizePolicy().hasHeightForWidth())
        self.textBrowser_3.setSizePolicy(sizePolicy)
        font = QtGui.QFont()
        font.setFamily("Times New Roman")
        font.setPointSize(12)
        self.textBrowser_3.setFont(font)
        self.textBrowser_3.setObjectName("textBrowser_3")
        self.verticalLayout_2.addWidget(self.textBrowser_3)
        self.horizontalLayout_4.addLayout(self.verticalLayout_2)
        spacerItem4 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_4.addItem(spacerItem4)
        spacerItem5 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_4.addItem(spacerItem5)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.line_3 = QtWidgets.QFrame(self.centralwidget)
        self.line_3.setFrameShape(QtWidgets.QFrame.HLine)
        self.line_3.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.line_3.setObjectName("line_3")
        self.verticalLayout.addWidget(self.line_3)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.graphicsView = QtWidgets.QGraphicsView(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.graphicsView.sizePolicy().hasHeightForWidth())
        self.graphicsView.setSizePolicy(sizePolicy)
        self.graphicsView.setObjectName("graphicsView")
        self.horizontalLayout_3.addWidget(self.graphicsView)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label_25.setText(_translate("MainWindow", "STDE"))
        self.label_23.setText(_translate("MainWindow", "DATA9"))
        self.label_22.setText(_translate("MainWindow", "DATA8"))
        self.label_21.setText(_translate("MainWindow", "DATA7"))
        self.label_20.setText(_translate("MainWindow", "DATA6"))
        self.label_19.setText(_translate("MainWindow", "DATA5"))
        self.label_18.setText(_translate("MainWindow", "DATA4"))
        self.label_17.setText(_translate("MainWindow", "DATA3"))
        self.label_16.setText(_translate("MainWindow", "DATA2"))
        self.label_15.setText(_translate("MainWindow", "DATA1"))
        self.label_14.setText(_translate("MainWindow", "DATA0"))
        self.label_5.setText(_translate("MainWindow", "ADDR"))
        self.label_3.setText(_translate("MainWindow", "STDE_NUM"))
        self.pushButton.setText(_translate("MainWindow", "确定"))
        self.pushButton_5.setText(_translate("MainWindow", "读出寄存器"))
        self.pushButton_2.setText(_translate("MainWindow", "写入寄存器"))
        self.pushButton_4.setText(_translate("MainWindow", "存入存储器"))
        self.pushButton_6.setText(_translate("MainWindow", "存入初始化"))
        self.pushButton_3.setText(_translate("MainWindow", "初始化SPI"))
        self.label_2.setText(_translate("MainWindow", "预览数据"))
        self.label_4.setText(_translate("MainWindow", "读取数据"))
        self.label_6.setText(_translate("MainWindow", "初始化指令"))

2，主代码：

from PyQt5 import QtWidgets
from PyQt5 import QtGui
from PyQt5.QtWidgets import QMessageBox, QGraphicsPixmapItem
import GUI
import sys
import ControlSPI
import time
import re



class my_mainwindow(QtWidgets.QMainWindow):
    def __init__(self):
        #PyQt5中，每个应用程序都必须实例化一个QApplication()：
        app = QtWidgets.QApplication(sys.argv)
        my_MainWindow = MainWindow()#这里用重写的那个mainwindow类
        self.my_ui = GUI.Ui_MainWindow()
        self.my_ui.setupUi(my_MainWindow)
############################################################################################################

        self.my_ui.textBrowser.setFixedHeight(300)
        self.my_ui.textBrowser_2.setFixedHeight(300)
        self.my_ui.textBrowser_3.setFixedHeight(300)
        self.my_ui.textBrowser.setFixedWidth(300)
        self.my_ui.textBrowser_2.setFixedWidth(200)
        self.my_ui.textBrowser_3.setFixedWidth(200)

#####################################################################################################
        self.STDE_infomation = ["L-STDE-A", "H-STDE-A", "L-STDE-B", "H-STDE-B", "L-STDE-C", "H-STDE-C"]
        self.STDE_num = ["1", "2", "3", "4", "5", "6"]
        self.my_ui.comboBox.addItems(self.STDE_infomation)
        self.my_ui.comboBox_2.addItems(self.STDE_num)

        self.my_ui.lineEdit.setPlaceholderText('0x+16进制数字')

        self.pix = QtGui.QPixmap('2.png')
        self.scene = QtWidgets.QGraphicsScene()#创建场景
        self.item = QGraphicsPixmapItem(self.pix)  # 创建像素图元
        self.item.setScale(1.49)#放大1.49倍
        self.scene.addItem(self.item)#将图元添加到场景中
        self.my_ui.graphicsView.setScene(self.scene)#将场景加入到视图中显示出来

        self.click_pushbutton(my_MainWindow)
        self.my_ui.comboBox.activated.connect(lambda :self.Check_process(my_MainWindow))#combobox动作了之后，执行check_process函数

#########################################################################################################################
        #调用QWidget对象的show()方法将创建的窗口显示出来
        #调用应用程序对象的exec_()方法来运行程序的主循环，并使用sys.exit()方法确保程序能够完美的退出。
        my_MainWindow.show()
        sys.exit(app.exec_())

    def click_pushbutton(self,my_MainWindow):
        self.my_ui.pushButton.clicked.connect(lambda:self.DATA_get(my_MainWindow))
        self.my_ui.pushButton_2.clicked.connect(lambda:self.Check_process(my_MainWindow))
        self.my_ui.pushButton_4.clicked.connect(lambda:self.Check_process(my_MainWindow))
        self.my_ui.pushButton_3.clicked.connect(lambda:self.Check_process(my_MainWindow))
        self.my_ui.pushButton_5.clicked.connect(lambda:self.Check_process(my_MainWindow))
        self.my_ui.pushButton_6.clicked.connect(lambda: self.Check_process(my_MainWindow))

    def DATA_get(self, my_MainWindow):
        pattern = '0[x|X][0|1][0-9a-fA-F]'#判断模板：0x**  十六进制格式
　　　　 #pattern = '^[0-9]{1,4}\.[0-9]{1,3}$'#匹配正则表达式 ^表示开头，$表示结尾 该语句表示匹配以1~4个数字开头，接着是小数点，接着以1~3个数字结尾的字符串
        ADDR = self.my_ui.lineEdit.text()
        if len(ADDR) == 4:
            flag = re.match(pattern, ADDR)  # 如何判断输入的字符是否符合相应的要求呢？使用正则表达式，即使用re模块。
            if flag:
                ADDR_Bin = bin(int(ADDR, 16))[2:]  # 转换为二进制，并且去掉“0b”
                ADDR_Bin = ADDR_Bin.rjust(5, '0')  # 原字符串右侧对齐， 左侧补零，补齐后总位宽为8
            else:
                QMessageBox.warning(my_MainWindow, "警告", "输入ADDR不对哟", QMessageBox.Yes)
                return
        else:
            QMessageBox.warning(my_MainWindow, "警告", "输入ADDR只能是4个字符呐", QMessageBox.Yes)
            return
        QMessageBox.warning(my_MainWindow, "警告", "你成功引起了我的注意", QMessageBox.Yes)

    def Check_process(self,my_MainWindow):
        time.sleep(1)
        QMessageBox.warning(my_MainWindow, "警告", "你成功引起了我的注意", QMessageBox.Yes)


class MainWindow(QtWidgets.QMainWindow):
    """对QMainWindow类重写，实现一些功能"""

    def closeEvent(self, event):
        """
        重写closeEvent方法，实现QMainWindow窗体关闭时执行一些代码
        :param event: close()触发的事件
        :return: None
        """
        reply = QtWidgets.QMessageBox.question(self,
                                                   '本程序',
                                                   "是否要退出程序？",
                                                   QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No,
                                                   QtWidgets.QMessageBox.No)
        if reply == QtWidgets.QMessageBox.Yes:
            event.accept()
            # Close device
            ControlSPI.VSI_CloseDevice(ControlSPI.VSI_USBSPI, 0)
        else:
            event.ignore()





if __name__ == "__main__":
    my_mainwindow()